Sharp R-403KKT Service Manual

Sharp R-403KKT Manual

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  • Sharp R-403KKT | Service Manual - Page 1
    R403KKT SERVICE MANUAL S0602R403KPK/ MICROWAVE OVEN MODELS R-403KK-T In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used. WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing
  • Sharp R-403KKT | Service Manual - Page 2
    5. GENERAL INFORMATION [1] GROUNDING INSTRUCTIONS 5-1 [2] OVEN DIAGRAM 5-1 CHAPTER 6. OPERATION [1] DESCRIPTION OF OPERATING SE- QUENCE 6-1 [2] OVEN SCHEMATIC 6-2 [3] DESCRIPTION AND FUNCTION OF COMPONENTS 6-3 CHAPTER 7. TROUBLESHOOTING GUIDE [1] TROUBLESHOOTING CHART 7-1 CHAPTER 8. TEST
  • Sharp R-403KKT | Service Manual - Page 3
    microwave power for any service test or inspection within the microwave generating compartments, check the magnetron, wave guide Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found with emissions in excess of 4mW/cm2. The owner of the unit should be instructed
  • Sharp R-403KKT | Service Manual - Page 4
    contact with following parts may result in a severe, possibly fatal, electrical shock. (Example) High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. Read the Service Manual carefully and follow all instructions. Don't Touch
  • Sharp R-403KKT | Service Manual - Page 5
    sure that the actual instrument is operating normally as specified in its instruction booklet. Important: Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing. 2. Place
  • Sharp R-403KKT | Service Manual - Page 6
    R403KKT RC40H3KAKTPTER 3. FOREWORD AND WARNINGService Manual [1] FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-403KK-T. It is recommended that service personnel carefully study the
  • Sharp R-403KKT | Service Manual - Page 7
    4. PRODUCT DESCRIPTION Service Manual [1] SPECIFICATIONS ITEM Power Control System Clock (1:00 - 12:59) Timer (0 - 99 minutes 99 seconds) Microwave Power for Variable Cooking Repetition Rate; P-HI Full power throughout the cooking time P-90 21, Chapter 1, Subchapter J R403KKT 4 - 1
  • Sharp R-403KKT | Service Manual - Page 8
    R403KKT RC40H3KAKTPTER 5. GENERAL INFORMATION Service Manual [1] GROUNDING INSTRUCTIONS unless the door is securely closed. 3. Removable turntable support 2 4. Removable turntable. The turntable will rotate clockwise seconds. 10.Waveguide cover: 11.Power supply cord. 5 10 4 3 7 9 11 8 1
  • Sharp R-403KKT | Service Manual - Page 9
    2. TOUCH CONTROL PANEL R403KKT NOTE: Some one-touch cooking features such as "MINUTE PLUS" are disabled after three minutes when the oven is not in use. These features are automatically enabled when the door is opened and closed or the STOP/ CLEAR pad is pressed. 5 - 2
  • Sharp R-403KKT | Service Manual - Page 10
    R403KKT RC40H3KAKTPTER 6. OPERATION Service Manual [1] DESCRIPTION OF OPERATING SEQUENCE The following is the cooking time, the power transformer, oven lamp, etc. are turned off, and the generation of microwave energy is stopped. The oven will revert to the OFF condition. 6) When the door is opened
  • Sharp R-403KKT | Service Manual - Page 11
    1. Off Condition SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY OVEN THERMAL CUT-OUT MAGNETRON TEMPERATURE FUSE R403KKT NOTE: " " indicates components with potentials above 250V "TO LOAD" "TO SOURCE" MAGNETRON BLK MONITOR FUSE (20A) H GRN C2 120VAC GND
  • Sharp R-403KKT | Service Manual - Page 12
    R403KKT [3] DESCRIPTION AND FUNCTION OF COMPONENTS 1. DOOR OPEN MECHANISM The door is opened by if an over heated condition develops in the tube due to cooling fan failure, obstructed air guide, dirty or blocked air intake, etc. Under normal operation, the magnetron temperature fuse remains closed
  • Sharp R-403KKT | Service Manual - Page 13
    Manual R403KKT Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected. When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many of the possible causes of trouble PROBLEM
  • Sharp R-403KKT | Service Manual - Page 14
    R403KKT RC40H3KAKTPTER 8. TEST PROCEDURES Service Manual [1] Procedure A: MAGNETRON ASSEMBLY TEST 1. Disconnect the power the oven and check all functions. 1. MICROWAVE OUTPUT POWER The following test procedure should be carried out with the microwave oven in a fully assembled condition (outer
  • Sharp R-403KKT | Service Manual - Page 15
    supply a forward bias voltage of more than 6.3 volts. R403KKT [4] Procedure D: HIGH VOLTAGE CAPACITOR TEST 1. Disconnect the cut-out terminals in the table below. Parts Name Temperature fuse 150°C Thermal cut-out magnetron, especially the cooling fan and air guide. An open thermal cut-out (Oven)
  • Sharp R-403KKT | Service Manual - Page 16
    R403KKT [7] Procedure F: SECONDARY INTERLOCK SYSTEM TEST 1. DOOR SENSING SWITCH 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open. 3.
  • Sharp R-403KKT | Service Manual - Page 17
    microwave ovens, proper maintenance cannot be performed with only a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key Unit, and also the Control Unit is divided into two units, CPU Unit and Power Unit, and troubleshooting
  • Sharp R-403KKT | Service Manual - Page 18
    R403KKT b) When touching the pads, no pads produce a signal. 2) In connection with indicators group of indicators do not light up. g) The figure of all digits flicker. 3) Other possible problems caused by defective control unit. a) Buzzer does not sound or continues to sound. b) Clock does not
  • Sharp R-403KKT | Service Manual - Page 19
    RELAY TEST R403KKT 1. Disconnect the relay coil with a D.C. voltmeter during the microwave cooking operation. DC. voltage indicated Defective relay. DC open. 3) Discharge high voltage capacitor. 4) Follow the troubleshooting guide given below for repair. STEPS OCCURRENCE CAUSE OR CORRECTION
  • Sharp R-403KKT | Service Manual - Page 20
    R403KKT 5) Make a visual inspection of the varistor. Check for burned damage and outer case is installed. c bd 9) Run the oven and check all functions. 2. Follow the troubleshooting guide given below, if indicator does not light up after above check and repairs are finished. 1) Disconnect
  • Sharp R-403KKT | Service Manual - Page 21
    RC40H3KAKTPTER 9. TOUCH CONTROL PANEL ASSerSvEicMe BMLanYual R403KKT [1] OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units. (1) Key Unit (2) Control Unit (The Control Unit consists of Power Unit
  • Sharp R-403KKT | Service Manual - Page 22
    R403KKT Pin No. Signal 18 P50 19 20 21 22-23 P47 P46 P45 P44- -voltage circuit driving signal. To turn on and off the cook relay (RY2). The signals holds "L" level during microwave cooking and "H" level while not cooking. In other cooking modes (variable cooking) the signal turns to "H" level
  • Sharp R-403KKT | Service Manual - Page 23
    . Connected to LCD signal COM1. Common data signal. Connected to LCD signal COM2. Power source voltage input terminal. Standard voltage for LCD. Connected to GND. R403KKT 9 - 3
  • Sharp R-403KKT | Service Manual - Page 24
    R403KKT [3] SERVICING FOR TOUCH CONTROL PANEL 1. Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed. CMOS LSI have extremely high impedance at its input and
  • Sharp R-403KKT | Service Manual - Page 25
    RC40H3KAKTPTER 10. PRECAUTIONS FOR USINGSerLvEicAeDM-aFnRuaElE SOLDER R403KKT [1] Employing lead-free solder The "Main PWB" of this model employs lead-free solder. This is indicated by the "LF" symbol printed on the PWB and in the service manual. The suffix letter indicates the alloy type of the
  • Sharp R-403KKT | Service Manual - Page 26
    in the door interlock system. 6. There are defective parts in the microwave generating and transmission assembly. 7. There is visible damage to the oven. Do not operate the oven: 1. Without the RF gasket (Magnetron). 2. If the wave guide or oven cavity are not intact. 3. If the door is not closed
  • Sharp R-403KKT | Service Manual - Page 27
    HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. R403KKT NOTE: When replacing the outer case, the 2 special Torx all wire leads from magnetron. 5. Remove the two (2) screws holding the chassis support to the mag- netron and the oven cavity front flange. 6. Slide the magnetron
  • Sharp R-403KKT | Service Manual - Page 28
    R403KKT 3. Hold the chassis support to the oven cavity front plate and the magnetron with the two (2) screws. 4. Reconnect the wire leads to the magnetron. Refer to "PICTORIAL DIAGRAM". 5. Reinstall
  • Sharp R-403KKT | Service Manual - Page 29
    to be pinched. Control panel frame R403KKT Display window Small depression Slit Ribbon areas flat. No sharp edges must be evident after removal of the turntable motor cover. [11] COOLING procedure. 2. Hold the center of the bracket which supports the shaft of the fan motor on the flat table
  • Sharp R-403KKT | Service Manual - Page 30
    R403KKT Coil Groove joint pliers Shaft Stator Gap Bracket Rotor Rear View Shaft Axis opened. 4. Re-install outer case and check for microwave leakage around door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.) Latch Heads Door Door Sensing Switch Switch
  • Sharp R-403KKT | Service Manual - Page 31
    ) into the gap between the door stopper and the choke cover to free engaging parts as shown in Figure C-4. 4. Try the principles of the R403KKT 2) An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards. 3. After any service
  • Sharp R-403KKT | Service Manual - Page 32
    12 - 1 Figure S-1. Pictorial Diagram to Chassis support CONTROL UNIT 2 GRN 1 GRY CN-B DOOR SENSING SWITCH COM. N.O. GRY GRN WHT WHT RED HIGH VOLTAGE CAPACITOR POWER TRANSFORMER H.V. RECTIFIER R403KKT RC40H3KAKTPTER 12. CIRCUIT DIAGRAMS [1] Pictorial Diagram (Figure S-1) Service Manual
  • Sharp R-403KKT | Service Manual - Page 33
    15 DEFROST 48 SOFTEN MELT COOK 7 0 CN-G 5597-12CPB7F KEY UNIT G3 G2 G1 START TIMER CLOCK STOP CLEAR POWER LEVEL WARM 9 3 MINUTE PLUS 6 POPCORN R403KKT
  • Sharp R-403KKT | Service Manual - Page 34
    R403KKT [3] Printed Wiring Board (Figure S-3) Figure S-3. Printed Wiring Board 12 - 3
  • Sharp R-403KKT | Service Manual - Page 35
    PARTS LIST R403KKT MICROWAVE OVEN HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly, please furnish the following information. 1. MODEL NUMBER 2. REF. NO. 3. PART NO. MODEL R-403KK-T 4. DESCRIPTION Parts marked "*" may cause undue microwave exposure. Parts
  • Sharp R-403KKT | Service Manual - Page 36
    R403KKT [1] OVEN PARTS 2-1 7-10 7-2 7-10 4-13 7-2 6-3 6-4 1-6 4-11 1-10 7-1 1-2 7-9 4-3 1-7 7-6 1-1 7-5 1-3 4-5 7-8 7-8 4-4 4-7 6-2 6-1 7-10 2-3 7-1 2-2 2-3 7-10 4-8 1-5 7-3 7-3 4-10 1-12 1-13 4-12 7-7 4-1 1-4 1-2 1-4 7-8 4-6 4-2 7-11 1-11 4-14 1-9 1-8 7-1 7-10
  • Sharp R-403KKT | Service Manual - Page 37
    XOTS740P10000 7-11 XOTS740P12000 PRICE NEW PART RANK MARK RANK DESCRIPTION R403KKT AY Noise filter assembly AW capacitor band AG Fan blade AT Chassis support -- Oven cavity (Not a replacement part) AG Switch lever AG Waveguide cover AF Cushion AC Cushion AC TTM packing
  • Sharp R-403KKT | Service Manual - Page 38
    R403KKT [2] DOOR AND CONTROL PANEL PARTS 5-1 5-2 5-3 5-8 5-5 5-4 5-7 5-6 3-1 3-1-1 3-1-2 3-1-3 3-5 3-5 3-4 6-5 3-3 3-2 Actual wire harness may be different from illustration. 6-7 6-6 4
  • Sharp R-403KKT | Service Manual - Page 39
    3-3 MSPRCA157WREZ AF 3-4 DPWBFC531WRKZ BK 3-5 XEPS730P08XS0 AB DOOR PARTS * 5-1 FDORFA412WRTZ BF 5-2 PSHEPA336WRP0 AF 5-3 GWAKPB020WRRZ AX frame Door screen Choke cover Latch head Latch spring Door stopper Main wire harness Filter harness Instruction book DESCRIPTION R403KKT 5
  • Sharp R-403KKT | Service Manual - Page 40
    R403KKT „INDEX PARTS CODE [ D ] DPWBFC531WRKZ [ F ] FACCDA083WRE0 FACCDA085WREZ FACCDA103WREZ FDORFA412WRTZ FFS- AH AM AB AB AB AB AG AC AB AA COPYRIGHT © 2006 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in retrieval systems, or transmitted in
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PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE EXPO-
SURE TO EXCESSIVE MICROWAVE ENERGY
BEFORE SERVICING
CHAPTER 1. WARNING TO SERVICE PERSONNEL
CHAPTER 2. MICROWAVE MEASUREMENT PRO-
CEDURE
CHAPTER 3. FOREWORD AND WARNING
CHAPTER 4. PRODUCT DESCRIPTION
CHAPTER 5. GENERAL INFORMATION
CHAPTER 6. OPERATION
CHAPTER 7. TROUBLESHOOTING GUIDE
CHAPTER 8. TEST PROCEDURES
CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY
CHAPTER 10. PRECAUTIONS FOR USING LEAD-
FREE SOLDER
CHAPTER 11. COMPONENT REPLACEMENT AND
ADJUSTMENT PROCEDURE
CHAPTER 12. CIRCUIT DIAGRAMS
Parts List
SERVICE MANUAL
R403KKT
CONTENTS
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
S0602R403KPK/
MICROWAVE OVEN
R-403KK-T
MODELS
In the interest of user-safety the oven should be restored to its origi-
nal condition and only parts identical to those specified should be
used.
WARNING TO SERVICE PERSONNEL: Microwave ovens con-
tain circuitry capable of producing very high voltage and cur-
rent, contact with following parts may result in a severe,
possibly fatal, electrical shock. (High Voltage Capacitor, High
Voltage Power Transformer, Magnetron, High Voltage Rectifier
Assembly,
High Voltage Harness etc..)